Lathe-chuck.



i UNTTED STATES PATENT OFFICE.

CHARLES F. WILLIAMS, OF ELLVVCCD CITY, PENNSYLVANIA.

LATHE-CHUCK.

SPECIFICATION forming part of Letters Patent No. 686,568, dated November 12, 1901.

Application led July 2, 1901. Serial No. 66,832. (No model.)

To all whom t may concern.-

Beit known that I, CHARLES F. WILLIAMS, a citizen'of the United States, residing at Ellwood City, in the county of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Lathe- Chucks; and I do herebydeclare the following to be a full, clear, and exact description of the invention, vsuch as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming a part of this specification.

My invention relates to improvements in lathe-chucks, and particularly to chucks forv holding pipe and other cylindrical work.

The objects of my invention are to so construct a'chuck that the jaws can be operated either in unison with each other or independently of each other with equal facility and so that the jaws can with equal facility be operated in unison toward and from the center of the axis of the shaft upon which the chuck is mounted or can be adjusted to operate in unison'toward andrfrom a center at one side of the Vcen'ter of the shaft. These and other features of my invention are hereinafter fully A set forth and described, and illustrated in the accompanying drawings, in which-e- Figure 1 is a front View in elevation of my improved lathe-chuck. Fig. 2 is au end view in elevation of the same. Fig. -3 isa longitudinal section of the same on the line .fr min Fig. 2. Figs. 4 and 5 are end views in elevationof the movable chuck-blocks and jaws therein. i

In the drawings thus illustrating my invention, A is a hollow lathe-mandrehand B a collar on the back of the chuck-frame C, adapted to be screwed upon the lathe-mandrel. j The chuck-frame C is rectangular in shape, extending equal distances each way from the collar B thereon,and in one side of the frame C there is a shaft D, which extends the entire length thereof. In the frame C,I place jaw-blocks E E', adapted to fit into slides c on the inner faces of the sides of the frame C and provided with depressions e e to embrace the shaft D, where they are retained by means of a face-plate C', secured by screws c to the front of the frame C, so that the jawblocks E E will slide freely therein. In the jaw-block EJ secure jaws F F, provided with serrationsf, and in the jaw-block E', I secure a central jaw F', provided with serrations y, adapted to pass between the jaws F F when the jaws are brought together. These jaws F F and F shown are adapted to hold pipe; 6o but as they are removable they can be replaced by any form of jaw desired. In the center of the jaw-blocks E and E there are screw-threaded openings e2 and e3, one of which is provided with a right-hand thread and the other with a lefthand thread. Through the centers of the ends of the frame C, I place screwsHH', one of which is righthand threaded and the other left-hand threaded to iit the threaded openings e2 and e3 in 7o the j aw-blocks E and E. On the screws H H' I secure collars h and h,which operate against the inner faces of the frame C to prevent endwise thrust of the screws H and H', as clearly shown in Fig. 3.

The shaftD is provided with small gearpinions I I, removably secured to its ends d d lon the outside of the ends of the frame C, and

the ends d of the shaft D are also squared outside of the pinions I so as to receive a 8o wrench. On the ends h2 h3 of the screws H and H', I secure gear-wheels J J, preferably of twice the diameter of the gear-pinions I I,

so that a wrench applied to one end of the shaft Denables the operator to utilize the power of the small gear-pinions I I, exerted through the large gears J J on the screws H H. The ends h2 h3 of the screws H and H' outside of the gear-wheels J J are also squared so as to receive a wrench when desired. It is ob- 9o vious from this construction that a wrench applied to one end of the shaft D will move the screws E and E' in unison, and a wrench applied to either end h2 or h3 of the screws H or H' will also move the screws I-I and H' in 95 unison, but when it is desired to move the jaws F and F independently of each other it is simply necessary to remove one of the pinions Ifrom the shaft D.

It will also be observed that there is a scale- 10o mark M on the jaw-block E and a scale-mark M' on the jaw-block E and that on the faceplate C there are scale-marks L and L', the object of these scale-marks being to facilitate the speedy adjustment of the jaw-blocks E and E, so that the jaws F and F will operate in unison toward and from the center of the shaft upon which the chuck is mounted or toward and from a point at one side of the center of the shaft if so adjusted, as may be desired. Scale marks N and N are also placed upon the gear-pinions I and the gearwheels J for the purpose of facilitating the readjustment of the removable gear-pinions I on the shaft D. It is obvious that the operator can by means of these scales and the removable pinions I on the shaft D adjust the jaws of the chuck to operate in unison toward and from any center desired or so that he can use the chuck as an independent jawed chuck, as may be desired.

I have thus shown and described a lathechuck embodying my invention so that others skilled in the art to which this invention appertains can utilize the same, but I do not desire to confine myself to the exact construction thereof herein shown and described, as I am aware that the same may be considerably modified without departing from the spirit of my invention.

Therefore what I claim as new, and desire to secure by Letters Patent of the United States, is-

In a lathechuck, the combination of a chuck-frame a longitudinal shaft in one side of said frame extending beyond the ends thereof, removable gear-pinions on the ends of said shaft, jaws moving in guides in said frame, scales on said jaws and the side of the frame, right and left hand screws for adjusting said jaws, and gear-wheels on said screws intermeshing with the removable gear-pinions on said shaft, substantially as and for the purpose set forth.

In testimony whereof I ailx my signature in presence of two witnesses.

CHARLES F. WILLIAMS.

Witnesses:

W. MARSHALL SELKIRK, S. P. TURNER. 

